开始时间大于等于当前时间和结束时间，结束时间为开始时间和当前时间之间。

<a-date-picker
     placeholder="开始时间"
     @change="selectStart"
     :disabled-date="disabledDate"
     :format="dateFormat"
     v-model:value="beginTime"
     style="margin: -5px 0;width: 100%" />

<a-date-picker
     placeholder="结束时间"
     @change="selectStart"
     :disabled-date="disabledEndDate"
     :format="dateFormat"
     v-model:value="endTime"
     style="margin: -5px 0;width: 100%" />

const disabledDate = (current) => {
    const endDate = data.endTime ? dayjs(data.endTime) :null;
    const today = new Date();
    if(endDate){
      return current && (current > endDate || current > today);
    }else {
      return current && current > new Date();
    }
  };

  const disabledEndDate = (current) => {
    const startDate = data.beginTime ? dayjs(data.beginTime,dateFormat):null;
    const today = new Date();
    if (startDate) {
      return current && (current < startDate || current > today);
    }
    return current && current > today;
  };